Chain pipe-wrench.



No. 876,927. PATENTED JAN. 21, 1908.

e. AMBONN.

CHAIN P1121: WRENCH.

APPLICATION FILED MAY 6, 1907.

' 2 SHEETS-SHEET 1.

Flai. `0 gil- INVENTOR 1H: NoRRls PETERS cc., wAsmNnmN, n.

No. 876,927. PATBNTBD JAN.21,'1908.

G. AMBORN.

GHAINPIPE WRENCH.

APPLICATION FILED MAY-6. 1907.

2 SHEETS-SHEET 2.

INVENTOR rus NoRRls PETERS co., wAsHmcraN, a c4 :UNITED STATES PATENTOFFICE.

GEORGE AMBORN, OF NEW YORK, N. Y., ASSIGNOR TO .I. H. WILLIAMS & OO., OFBROOKLYN,

NEW YORK, A CORPORATION OF NEW YORK.

CHAIN PIPE-WRENCH.

Specification of Letters Patent.

' Patented Jan. 21, 1908.

Application filed May 6, 1907. Serial No. 372.038,

Toiallwwhom it may concern:

jff BejitknownthatjlGEORGE AMBORN, a citizen of the United States,residingin the borough of Brooklyn, county of Kings, city and State ofNew York, have invented certain new and useful Improvements in ChainPipe-VVrenches, of which the following is a specification.

This invention relates to chain pipe wrenches or the like, and aims toprovide certain improvements therein.

The present invention relates particularly to that type of wrench inwhich laterally separated jaws are provided between which the chain iscentrally pivoted so that it may swing to one side or the other and thusbe adapted for operation in connection with either of the working facesof the jaws.

The principal object of the present invention is to provide a wrench ofthis type in which the jaws are doubleeended, s o that each is providedwith two sets of working faces, such aws being adapted to be reversedwith relation to the handle, so that one or the other set of workingfaces may be brought into operative position.

In the preferred construction of my invention, the chainl is pivoted ina iiXed position centrally of the jaws, so that it is not necessary todetach it when the jaws are reversed.

Referring to the drawings, which illustrate several embodiments of myinvention, Figure 1 is a side elevation of a wrench, showing thepreferred construction. Fig. 2 is a top or plan view. Fig. 3 is anelevation showing the inner side of one of the jaws. Fig. 4 is a sectionon the line 4 4 in Fig. 1. Fig.y 5 is an elevation showing a modifiedconstruction. Fig. 6 is an elevation showing the inside of one of thejaws of the wrench shown in Fig. 5.

Referring first to Figs. l to 4,.let A indicate a suitable handle orshank which has fixed to its .forward end two jaws B, B as shown. Eachof the jaws B, B is double-ended, that is to say, instead of having onlythe working faces a, a on its front end, these faces are duplicated, asshown at t, U, at its rear end. Preferably the faces a and b and a and bare connected respectively by a curved portion c or c', such portions inuse serving as gages by which the necessary length of loop of theconstruct the lock as shown in Fig. 3.

The jaws are preferably fixed to the handle by means of bolts d and e,the former of which passes through holes f,f in the jaws and a hole h inthe handle, and the latter of which passes through holes g in the jawsand i in the handle. Preferably the jaws are slotted to receive thesides of the handle. The bolt e also serves as a pivot pin for the eye jto which the chain is connected. It is important that the bolt e becentrally arranged, that is to say, that it shall be disposed in such aposition that the chain C shall be capable of swinging to either theupper or under side of the wrench, sd as to bring the upperor lowerworking face a or a into operation. This arrangement of the pivot pin ofthe chain is also important in that it enables the chain to act from thesame point when the jaws are reversed, so that it is not necessary toalter the position of the pin or other connection.

In the present construction, in order to reverse the jaws the bolt d visremoved and the bolt e slackened sufficiently to permit thedisengagement of the jaws from the handle, whereupon they may be turnedaround the bolt e to their reverse positions in which the holes f in thejaws are brought into coincidence with the hole h of the handle,whereupon'the bolt d is replaced and both bolts tightened.

My invention provides-an improved form of locking means for the free endof the chain.

When the latter is constructed with locking pintles, as shown in Figs. 1and 2, I prefer to figure illustrates one side of each of the upper andlower locks, these being duplicated on the opposite jaw. In theconstruction shown I provide two oppositely-arranged hook-like members mand n which are adapt ed to engage the pintles of the chain, the memberm heilig adapted for use when the jaws are in the position shown inFigs. l and 2, and the member n being adapted for use when the jaws arereversed or turned end for end.

It will be observed that each of the locking members extends rearwardlywhen in its operative position. Preferably also the locking members arearranged so close together that the space between their ends issufiicient only to permit apintle on thechain to pass easily betweenthem. By this means the rear member constitutes a retaining de- Thisobtain La fresh grip upon the pipe, it will automatically rengage withits loch when the chain is tightened, so long as it is re- .iso

tained inany position in the recess 0. rIhe locking members m and npreferably are arranged with their locking faces close together, so thatwhen one of the locks is in engagement with a pintle the other lock liesbetween such pintle and the next rearward pintle.

In the modification illustrated in Figs. 5 and 6, I have shown aconstruction wherein the hook-shaped members m n perform the retainingfunction which they have in the construction just described, but thelocking function is performed by separate abutments m2 arranged betweenthe respective hook-like members and the ends of the jaws. In thisconstruction the forward abutment takes all of the strains of use whilethe rear retaining members engages the Aadjacent pintle and holds thesame so that the chain cannot swing out of engagement therewith in use.The proportions are such that when the rear pintle is in engagement withthe retaining member the forward pintle can automatically swing intoplace around the retained pintle as a center. .lo permit this movementthe abutments m2 'n2 are shaped so that a pintle may engage therewitl'iby a lateral movement toward the longitudinal axis of the wrench.4

In use the wrench is employed in the ordinary manner, theworking faces aor a being -brought to the front.

It will be seen that by my invention I provide a chain pipe wrench oranalogous device in which the wrench has double the wearing capacity ofthe single-j awed wrenches now in use, and in which the jaws have butlittle greater length or weight than those having but two working faces.It will also be observed that I provide a construction in which thechainis connected to the wrench at a single fixed point from which it iscapable of operation in all positions of the jaws` This is especiallyimportant in the type of wrench shown. wherein. the chain is locked uponthe opposite side to the pipe.

It will be observed that I do not wish to be limited to themodifications of my invention herein shown, as many changes may be madetherein without departing from the invention,

It is to be understood that my invention is applicable to other devicesthan chain wrenches, such, for instance, as chain pipe vises or thelike.

Vhat I claim is l. In a chain pipe wrench, the combination of a handle,a double-ended reversible jaw connected therewith, a chain pivotedthereto, and two hook-like members reversiblerwith the jaw and adaptedto engage thev chain in either position of said jaw.

2. In a chain pipe wrench, the combination of a handle, a double-endedreversible jaw connected therewith, a chain pivoted thereto, and twohook-like members arranged to form a recess between them, said membersbeing adapted to engage the chain in either position of said jaw.

3. In a chain pipe wrench, the combination of a handle, a double-endedreversible jaw connected therewith, a chain pivoted thereto, and meansfor locking said chain in both positions of said jaw, said meanscomprising two hook-likemembers facing in opposite directions, andreversible with the jaw.

4. In a chain pipe wrench, the combination of a handle, a double-endedreversible jaw connected therewith, a chain ivoted thereto, and meansfor locking said c ain in Y thereto, and means for locking said c ain inboth positions of said. jaw, said means comprising two hook-like'members extending toward each other, each of which is adapted to act asa locking member in one position of said jaw, and as a retaining memberin the other position of said jaw.

6. In a' chain pipe wrench, the combination of a handle, a double-endedreversible jaw connected therewith, a chain pivoted thereto and having'locking' pintles, and means for locking said chain in both posi tionsof said jaw, said means comprising two hook-like members extendingtoward each other and arranged close together so as to form a recessbetween them having a restricted opening adapted to receive a chainpintle.

7. In a chain pipe wrench, the combination of a handle, two double-endedreversible jaws connected therewith, a chain pivoted centrally betweensaid jaws, whereby said chain acts from the same point when the jaws arereversed, and means for locking said chain in both means comprising twohook-like members facing in opposite directions and formed upon saidjaws.

8. In a chain pipe wrench, the combinaositions of said jaws, said l tionof ahandle, two double-ended reversible at the upper sides of the jawsand the other 10 jaws connected therewith, a chain pvoted at the undersides thereof.

centrally between said aws, whereby said In witness whereof I havehereunto signed chain acts Jfrom the same point when the jaws my name inthe presence of two subscribing are reversed7 and means for locking saidwitnesses.

chain in both positions of said jaws, said GEORGE AMBORN. meanscomprising two sets of hook-like mem- Witnesses: bers each setcomprising two members facing EUGENE V. MYERS,

in opposite directions, one set being located THEoDoEE T. SNELL.

